The description of Gayatri Mantras of various Gods

The Gāyatrī Mantra is a highly revered mantra from the Vedas. Like all Vedic mantras, the Gayatri mantra is considered not to have an author, and like all other Vedic mantras, is believed to have been revealed to Brahmarshi Vishvamitra. It is a verse from a sukta of the Rigveda (Mandala 3.62.10). Gāyatrī is the name of the Vedic meter in which the verse is composed.[1] As the verse can be interpreted to invoke Savitr, it is also called the Sāvitrī mantra.[2] Its recitation is traditionally preceded by oṃ and the formula bhūr bhuvaḥ svaḥ, known as the mahāvyāhṛti "great (mystical) utterance".

The main mantra appears in the hymn RV 3.62.10. During its recitation, the hymn is preceded by oṃ (ॐ) and the formula bhūr bhuvaḥ svaḥ (भूर् भुवः स्वः). This prefixing of the mantra proper is described in the Taittiriya Aranyaka (2.11.1-8), which states that it should be chanted with the syllable oṃ, followed by the three Vyahrtis and the Gayatri verse. Whereas in principle the gāyatrī mantra specifies three pādas of eight syllables each, the text of the verse as preserved in the Samhita is one short, seven instead of eight. Metrical restoration would emend the attested tri-syllabic vareṇyaṃ with a tetra-syllabic vareṇiyaṃ.The Gayatri mantra is, in Devanagari: